Hourly Weather | Today Tuesday, September 23, 2025
Stamford, Connecticut
7 AM
Cloudy Weather
63°
Feels Like 63°
6
Humidity: 91%
Wind: 6 mph
UV Index: 0
8 AM
Cloudy Weather
66°
Feels Like 64°
5
Humidity: 88%
Wind: 6 mph
UV Index: 9
9 AM
Cloudy Weather
68°
Feels Like 70°
5
Humidity: 82%
Wind: 7 mph
UV Index: 18
10 AM
Cloudy Weather
72°
Feels Like 73°
6
Humidity: 77%
Wind: 7 mph
UV Index: 27
11 AM
Cloudy Weather
73°
Feels Like 79°
7
Humidity: 72%
Wind: 7 mph
UV Index: 37
12 PM
Cloudy Weather
75°
Feels Like 81°
7
Humidity: 68%
Wind: 8 mph
UV Index: 40
1 PM
Cloudy Weather
79°
Feels Like 82°
10
Humidity: 64%
Wind: 8 mph
UV Index: 38
2 PM
Cloudy Weather
79°
Feels Like 82°
15
Humidity: 62%
Wind: 9 mph
UV Index: 31
3 PM
Cloudy Weather
81°
Feels Like 82°
15
Humidity: 61%
Wind: 9 mph
UV Index: 27
4 PM
Cloudy Weather
79°
Feels Like 81°
19
Humidity: 66%
Wind: 9 mph
UV Index: 19
5 PM
Cloudy Weather
79°
Feels Like 79°
43
Humidity: 69%
Wind: 8 mph
UV Index: 10
6 PM
Cloudy Weather
77°
Feels Like 79°
47
Humidity: 73%
Wind: 8 mph
UV Index: 4
7 PM
Stormy Weather
73°
Feels Like 72°
51
Humidity: 80%
Wind: 7 mph
UV Index: 0
8 PM
Cloudy Weather
72°
Feels Like 73°
40
Humidity: 84%
Wind: 6 mph
UV Index: 0
9 PM
Cloudy Weather
70°
Feels Like 72°
34
Humidity: 89%
Wind: 6 mph
UV Index: 0
10 PM
Cloudy Weather
72°
Feels Like 72°
37
Humidity: 88%
Wind: 5 mph
UV Index: 0
11 PM
Cloudy Weather
70°
Feels Like 72°
47
Humidity: 87%
Wind: 5 mph
UV Index: 0

Hourly Air Quality Forecast - AQI (US EPA)

7 AM
49 AQI
Good air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 11.50 µg/m³
  • PM10: 14.60 µg/m³
  • O₃: 22.21 ppb
  • NO₂: 14.10 ppb
  • SO₂: 2.34 ppb
  • CO: 197.63 ppb

Health Recommendations:

With this level of air quality, you have no limitations. Enjoy the outdoors

8 AM
50 AQI
Good air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 11.46 µg/m³
  • PM10: 14.25 µg/m³
  • O₃: 20.86 ppb
  • NO₂: 14.86 ppb
  • SO₂: 2.51 ppb
  • CO: 208.09 ppb

Health Recommendations:

With this level of air quality, you have no limitations. Enjoy the outdoors

9 AM
51 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 11.11 µg/m³
  • PM10: 12.40 µg/m³
  • O₃: 24.65 ppb
  • NO₂: 13.79 ppb
  • SO₂: 2.99 ppb
  • CO: 199.70 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

10 AM
51 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 10.65 µg/m³
  • PM10: 12.32 µg/m³
  • O₃: 30.64 ppb
  • NO₂: 11.45 ppb
  • SO₂: 2.99 ppb
  • CO: 185.43 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

11 AM
51 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 10.17 µg/m³
  • PM10: 11.88 µg/m³
  • O₃: 36.63 ppb
  • NO₂: 9.10 ppb
  • SO₂: 3.00 ppb
  • CO: 171.15 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

12 PM
50 AQI
Good air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 10.44 µg/m³
  • PM10: 11.68 µg/m³
  • O₃: 44.58 ppb
  • NO₂: 7.68 ppb
  • SO₂: 2.81 ppb
  • CO: 169.33 ppb

Health Recommendations:

With this level of air quality, you have no limitations. Enjoy the outdoors

1 PM
49 AQI
Good air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 11.58 µg/m³
  • PM10: 12.73 µg/m³
  • O₃: 52.52 ppb
  • NO₂: 6.25 ppb
  • SO₂: 2.62 ppb
  • CO: 167.51 ppb

Health Recommendations:

With this level of air quality, you have no limitations. Enjoy the outdoors

2 PM
51 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 12.47 µg/m³
  • PM10: 13.59 µg/m³
  • O₃: 60.47 ppb
  • NO₂: 4.82 ppb
  • SO₂: 2.44 ppb
  • CO: 165.68 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

3 PM
51 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 12.92 µg/m³
  • PM10: 14.05 µg/m³
  • O₃: 61.06 ppb
  • NO₂: 4.88 ppb
  • SO₂: 2.30 ppb
  • CO: 165.10 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

4 PM
52 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 12.82 µg/m³
  • PM10: 13.95 µg/m³
  • O₃: 61.65 ppb
  • NO₂: 4.94 ppb
  • SO₂: 2.16 ppb
  • CO: 164.52 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

5 PM
52 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 12.42 µg/m³
  • PM10: 13.57 µg/m³
  • O₃: 62.25 ppb
  • NO₂: 5.00 ppb
  • SO₂: 2.02 ppb
  • CO: 163.93 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

6 PM
52 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 11.72 µg/m³
  • PM10: 12.92 µg/m³
  • O₃: 52.98 ppb
  • NO₂: 8.23 ppb
  • SO₂: 1.92 ppb
  • CO: 172.59 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

7 PM
53 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 11.29 µg/m³
  • PM10: 12.83 µg/m³
  • O₃: 43.71 ppb
  • NO₂: 11.46 ppb
  • SO₂: 1.82 ppb
  • CO: 181.24 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

8 PM
53 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 10.40 µg/m³
  • PM10: 11.91 µg/m³
  • O₃: 34.44 ppb
  • NO₂: 14.68 ppb
  • SO₂: 1.72 ppb
  • CO: 189.89 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

9 PM
53 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 9.62 µg/m³
  • PM10: 11.36 µg/m³
  • O₃: 32.77 ppb
  • NO₂: 14.36 ppb
  • SO₂: 1.78 ppb
  • CO: 183.41 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

10 PM
53 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 8.97 µg/m³
  • PM10: 10.52 µg/m³
  • O₃: 31.10 ppb
  • NO₂: 14.03 ppb
  • SO₂: 1.84 ppb
  • CO: 176.93 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

11 PM
53 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 8.92 µg/m³
  • PM10: 10.14 µg/m³
  • O₃: 29.43 ppb
  • NO₂: 13.71 ppb
  • SO₂: 1.90 ppb
  • CO: 170.45 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.